Permutation padlock



P. J. FONOS. PERMUTATION PADLOCK APPLICATION FILED JAN. 3. 1921.

Patented May 9 1922. 2 SHEETS-SHEET I.

ATToR/w: Y8.

P. l. FONOS.

PERMUTATION PADLOCK. APPLICATION FILED JAN. 3. 1921.

Patented May 9, 1922.

2 SHEETS-SHEET 2.

B 7 MAW ATTORNEYS its PATENT PERMUTATION IPADLOCK.

To all whom it may concern:

Be it known that 1, PETER J. FoNos, a citizen of the United States, residing at New Richmond, in the county of St. Croix and State of Wisconsin, have invented certain new and useful Improvements in Permutation Padlocks, of which the following is a specification.

My invention relates to permutation padlocks, and an object is to provide a lock of this character which may be readily re-set for a different combination when in unlocked condition. Another object is to provide a lock of this character which may be readily unlocked in the dark by a person who knows the combination.

The full objects and advantages of my invention will appear in, connection with the detailed description thereof, and the novel features embodied in my inventive idea will be particularly pointed out in the claims.

In the accompanying drawings which illustrate the application of my invention in one form,--

Fig. 1 is a front elevational view of my padlock. Fig. 2 is a front view with the operating knob removed. Fig. 3 is a view in section on line 33 ofFig. 9 with both tumblers in looking position. Fig. 4 is a view taken similarly to Fig. 3 but with one tumbler in looking position and the other one in unlocked position. Fig. 5 is a view taken similarly to Figs. 3 and 4 but with both tumblers in unlocked position. Fig. 6 is a face view of the rear tumbler. Fig. 7 is a view in section on the line 77 of Fig.

.8. Fig. 8 is a view in section on the line 8-8 of Fig. 3. Fig. 9 is a view in section on the line 9-9 of Fig. 8.

Referring to the particular construction shown in the drawings, my lock includes a circular casing comprising a front member 10 and a rear member 12 firmly secured together by means of a number of rivets 14. A post 16 is fixed to the center of the rear member 12 and as will be apparent from Figs. 8 and 9, this post extends forwardly beyond the front member passing through the open center thereof which is limited by a circular inturned flange 18 formed upon the front member. Rotatably mounted upon the post 16 and lying in the chamber formed.

Specification of Letters Patent.

between the front and rear members are two tumblers 20 and 22 which are spaced from each other by an annular flange 24 on the post. Pivotally attached to ears 26 and 28 carried by front and rear members respectively is a shackle 80, the locking end of which is provided with a groove and having flanges 32 and 34 as best shown in Fig. 8 which extend toward each other with a space between them. The flanges 32 and 34 are adapted to cooperate with annular outturned flanges 36 and 38 formed on the peripheries of the tumblers 20 and 22 respectively, these annular flanges engaging the 'flanges on the locking end of the shackle coming into engagement with each other as the tumblers are rotated. The front tumbler 20 is provided with a circular row of holes 48 any one of which is adapted to receive a peg 50 secured upon the inner face of a kn0b 52 which is rotatably mounted upon theforward portion of the post 16, the front end of this post being threaded to receive a burr 54 adapted to turn down into a recess in the front face of the knob. The burr is provided with a notch 56 by means of which it may be screwed down or removed in order that the knob may be pulled outwardly for a purpose which will presently appear. Extending out from the rear margin of the knob 52 is an indicating finger 58 which is adapted to register with radially arranged marks of a dial 60 formed upon the face of the front member 10 around its open center. Referring to Fig. 9, it

' will be seen that the peg 50 and the indieating finger 58 occup the same angular position on the knob. Ks will be seen from Fig. 2, the surrounding wall of the open center is provided with a plurality ofteeth 62 corresponding with the marks on the dial and, as shown in Fig. 9, the periphery of Patented May 9, 1922. Application filed January 3; 1921. Serial No. 434,533.

the rear portion of the knob 52 is provided with a spring pressed dog 64- adapted to engage the teeth 62. As shown in Figs. 1 and 2, thedial is provided with a small projection 66 which is placed upon the mark designated 4: since this is considered the starting point when it is desired to open the lock in the dark.

The operation and advantages of my invention will be obvious from the foregoing description.

In the embodiment shown, employing two tumblers, it will be understood that in order to open the lock the knob must be turned in one direction until the indicating finger registers with a. predetermined number on the dial and then must be turned in the opposite direction until this finger registers with another predetermined number according to the combinationforwhich the lock is set. Fig. 3 shows the knob in the process of being turned counterclockwise with the pin 44: on the front tumbler engaging the ,pin 4:6.on the rear tumbler so that the rear tumbler is turned by means of the front tumbler. Fig. t shows the position of the parts when the knob has been turned just far enough in counterclockwise direction to bring the notch 44- of the rear tumbler intounlocking position. As will be apparent from comparthe position of the peg in Fig. 4 with the dial in Figs. 1 or 2, the indicating finger at this time stands at the number 36. The knob is turned then in clockwise direction, thereby rotating the front tumbler without moving the rear tumbler and the front tumbler is brought into position shown in Fig. '5 so that the notch 4:0 is also brought into proper position for unlocking. By comparing the position of the peg 50 in this figure with the numbers on the dial, it will be seen i that the indicator finger now stands at the number 8. Therefore, the particular combination for which the lock was set with the parts arranged as shown is left to number 36 and then right to the number 8. The combination may be readily changed when the lock is in unlocked condition in the following manner. Upon unscrewing the burr 54, theknob may be removed so asto bring the peg 50 out oftheparticular one of the holes 4-8 in which it was engaged. I The knob may then be positioned so as to engage the peg in another of the holes as according to the particular combination desired, it being understood that the position of the peg cor responds to that of the indicator finger and that the notches 4:0 and 4-2 in the tumblers may be seen through the opening 39- feeling the pin 66 he may readily bring the indicator finger 58 in register therewith. He

then knows that he must turn the knob four numbers to the left in order to bring the finger into register with the mark 36 on the dial. This he can easily do on account of the dog 6% moving from one tooth 62 to another for each mark on the dial. The teeth traversed by the dog can be readily told both by the feel and by the click of of said shackle, a knob rotatively mounted upon the forward portion of said post, means for connecting said knob to the front tumbler, and means which permits said connection to be shifted to change the combination when the lock is in unlocked condition.

2. A permutation padlock comprising a casing, a shackle mounted upon said casing, a forwardly extending post secured to the back of said casing, tumblers rotatably mounted upon'said post, means on said tumblers for cooperation with the'locking end of said shackle, a knob rotatably mounted upon the forward portion of said post, means for adjustably connecting-said knob to the front tumbler, and means cooperating with said knob andsaid tumblers toenable a person familiar with the combination to I open the lock in the dark.

3. A permutation padlock comprising a casing, a shackle mounted upon said-casing, a forwardly extending post secured to the back of said casing, tumblers rotatably mounted upon said post, means on, said tumblers for cooperation with the locking end of said shackle, a knob rotatablymounted upon the forward portion of said post, a

peg secured to said knob for engaging .1n

any one of a row of holes in the front tumbler, and means for detachably holding said knob'in place to permit removal thereof for insertion of said peg in any one of said holes in order to change the combination when the lock is in unlocked condition.

4:. A permutation padlock comprisinga I casing, a shackle mounted upon said casing, a forwardly extending post secured to the back of said casing, tumblers rotatably mounted upon said post means on said tumblers for cooperation with the looking end of said shackle, a knob rotatablymounted upon the forward portion of said 'post,

means for connecting said knob to the front tumbler, a spring pressed dog mounted in said knob for engagement with teeth formed in said casing, an indicator finger carried by said knob for cooperation with a dial on the casing, and a pin extending out from said dial with which said finger may be miliar with the combination may open the look in the dark.

In testimony whereof I hereunto affix my signature.

PETER J. .FONOS. 

